JP2007175712A - Device and method for coiling metal strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for coiling a metal strip which can be easily performed, and correctly prevent any winding deviation of an outer circumference part of a coil. <P>SOLUTION: Flange parts 22a, 23a are provided on cradle rolls 22, 23 of a coil car 21 attached to a winding device, and a steel strip is wound while constraining both width ends of a tail end of the steel strip 1 by the flange parts 22a, 23a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a winding device and a winding method for a metal strip.

  In the rolling line, the rolled metal strip (for example, steel strip) is wound around the winding shaft (mandrel) 11 of the winding device 10 and wound as the coil 2 as shown in FIG.

  At that time, the steel strip 1 is guided by the side guide 5 and is pressed by the pinch roll 6 on the entry side of the winding device 10 and is applied with a certain tension, so that the steel strip 1 is wound in a coil shape without unevenness. However, if the rearmost end 1a of the steel strip 1 passes through the side guide 5, there is no guidance and it becomes easy to meander. For this reason, the side edge of the tail end portion of the steel strip 1 becomes uneven, and a winding deviation (coil outer circumference deviation) of the coil outer circumference as shown in FIG. 10 occurs.

As a method for preventing such winding deviation of the outer periphery of the coil, in Patent Document 1, a coil presser that presses against the coil the side guide roll that restrains both width ends of the steel strip and the upper surface of the steel strip at the winding start contact point. A technique for providing a mechanism and thereby preventing winding deviation is disclosed. In addition, patent document 1 is the technique which made the main object the continuous production line of cold-rolled steel plates, such as a continuous annealing line, as it is clear also from having the shear equipment.
Japanese Patent Laid-Open No. 10-166054

  However, in the above-mentioned Patent Document 1, it is necessary to install the side guide roll and the support body of the coil pressing mechanism in accordance with the winding start point. For example, in a hot rolling line for producing a hot-rolled steel strip, FIG. As shown in FIG. 2, a guide apron 12 and a presser roll 13 for winding the tip of the steel strip 1 around the mandrel 11 are installed in the winding device 10 so as to surround the outer periphery of the coil 2 and interfere with them. Therefore, it is difficult to install the side guide roll and the like.

  The present invention has been made in view of the circumstances as described above, and can be easily implemented and can accurately prevent winding deviation of a coil outer peripheral portion and a winding device for a metal strip and a winding The purpose is to provide a method of taking.

  As a result of intensive studies to solve the above problems, the present inventors have come to use a coil car attached to a winding device. That is, as shown in FIG. 9, the coil car 21 is raised before the winding is completed, the cradle rolls 22 and 23 are pressed against the coil 2 to prevent the coil 2 from being loosened, and the coil 2 that has been wound is paired with the coil car 21. It is placed on the cradle rolls 22 and 23 and transported to the next process. Since it is originally attached to the winding device, it does not interfere with other devices. And if it was made to restrain both width | variety edge parts of tail ends, such as a steel strip, with those cradle rolls, it thought that the winding shift | offset | difference of a coil outer peripheral part could be prevented exactly.

  Based on the above concept, the present invention has the following features.

  [1] In a metal strip winding device including a shaft that winds a metal strip around a coil and a coil car that carries the wound coil on a pair of cradle rolls, the pair of cradle rolls includes: Each of the end portions is provided with a flange portion, and the flange portions are disposed so as to face each other with a coil interposed therebetween, and each moving portion is provided with a moving mechanism for moving each cradle roll in the axial direction. A metal belt take-up device.

  [2] A metal band winding device including a shaft for winding a metal band around a coil, and a coil car that carries the wound coil on a pair of cradle rolls, and the pair of cradle rolls includes: In addition, a metal band winding device is characterized in that flanges are provided at both end portions, and a moving mechanism for moving each cradle roll in the axial direction is provided.

  [3] A metal band winding method using the metal band winding device according to [1] or [2], wherein the pair of cradle rolls are moved in the axial direction, and the A winding method for a metal band, wherein the winding is performed while restraining both width ends of the tail end of the band.

  In the present invention, a hook is provided on the cradle roll of the coil car attached to the winding device for the metal band, and the both ends of the width of the tail end of the metal band are wound with the hook being restrained. Therefore, it is possible to easily carry out, and it is possible to accurately prevent the winding deviation of the outer periphery of the coil.

  The present invention is characterized by a cradle roll of a coil car attached to a winding device for a metal strip (hereinafter referred to as a steel strip), and an embodiment of the present invention will be described based on the drawings. FIG. 1 is a top view of a cradle roll according to an embodiment of the present invention, and FIG. 2 is a bottom view thereof.

  As shown in FIG. 1, the pair of cradle rolls 22 and 23 are provided with flange portions (stepped portions) 22 a and 23 a so as to face each other with the coil 2 interposed therebetween.

  As shown in FIG. 2, the cradle rolls 22 and 23 can be moved in the axial direction by a rack-pinion moving mechanism. That is, racks 24 and 25 are provided on the lower surfaces of the cradle rolls 22 and 23, respectively, and the rotation of the pinion 26 provided between the cradle rolls 22 and 23 causes the cradle rolls 22 and 23 to move in the opposite directions in the axial direction. They move by a distance and approach each other and move away from each other.

  And it winds up, restraining the both width | variety edge part of the tail end part of a steel strip with the collar parts 22a and 23a of the cradle rolls 22 and 23, and it is trying to prevent the winding shift | offset | difference of a coil outer peripheral part.

  The height h (see FIG. 3) of the flange portions 22a and 23a of the cradle rolls 22 and 23 is determined based on the thickness of the steel strip and the length to be restrained (that is, the thickness of the outer periphery of the coil to be restrained). For example, h = 20 mm.

  A procedure for winding the steel strip using the winding device configured as described above will be described with reference to FIGS. In each figure, (a) shows the state of sheet passing of the entire steel plate, and (b) shows the movement of the cradle roll corresponding to the state of sheet passing.

  (1) First, as shown in FIG. 4, until the rearmost end 1a of the steel strip 1 reaches the side guide 5, the upper surface of the cradle roll is a predetermined distance g (for example, 10 mm) from the final winding diameter of the coil. The coil car 21 is kept waiting so as to be positioned only downward. At that time, the distance S between the flange portion 22a of the cradle roll 22 and the flange portion 23a of the cradle roll 23 is set larger than the plate width W of the steel strip 1 by a predetermined amount (for example, 20 mm). The predetermined distance g is such that when the outermost end 1a of the steel strip 1 begins to pass through the side guide 5, the outer periphery of the coil 2 at that time wraps with the flanges 22a and 23a of the cradle rolls 22 and 23. The distance determined in

  (2) Next, as shown in FIG. 5, when the rearmost end 1a of the steel strip 1 begins to pass through the side guide 5, the cradle rolls 22, 23 are moved in the axial direction, and the respective flange portions 22a, 23a is brought into contact with the width end portion of the steel strip 1 (width end portion of the coil 2).

  (3) Then, as shown in FIG. 6, when the rearmost end 1 a of the steel strip 1 has passed through the side guide 5, the coil car 21 is raised and the cradle rolls 22 and 23 are pressed against the outer periphery of the coil 2. This restrains both width ends of the tail end portion of the steel strip 1 with the flange portions 22a and 23a of the cradle rolls 22 and 23 to prevent winding deviation while preventing winding looseness.

  (4) Then, as shown in FIG. 7, when the rearmost end 1a of the steel strip 1 is wound up, the winding is completed.

  Thus, in this embodiment, the cradle rolls 22 and 23 of the coil car 21 are provided with the flange portions 22a and 23a, and the flange portions 22a and 23a restrain both width end portions of the tail end portion of the steel strip 1 with the flange portions 22a and 23a. Therefore, the winding can be easily performed, and the winding deviation of the outer peripheral portion of the coil 2 can be accurately prevented.

  In this embodiment, the mechanism for moving the cradle rolls 22 and 23 in the axial direction uses a mechanism that moves in synchronization by a rack-pinion, but a mechanism that moves individually by a hydraulic cylinder or the like is used. Also good.

  Next, FIG. 8 is a top view of a cradle roll according to another embodiment of the present invention, in which (a) is an initial state, and (b) is a flange portion with both width end portions of the tail end portion of the steel strip. It shows the restrained state. As shown in FIG. 8, the pair of cradle rolls 22 and 23 are provided with flanges (stepped portions) 22 a and 22 b and 23 a and 23 b that are wider than the plate width W of the steel strip 1 at both ends. Are provided. Other axial movement mechanisms, the height of the buttock, and the procedure for winding the steel strip may be the same as in the above-described embodiment.

  According to the embodiment shown in FIG. 8, by changing the direction in which the cradle roll is moved in the axial direction for each coil, for each rolling cycle, and the like, the restraint of both width end portions of the tail end portion of the steel strip 1 is performed. Since not only the flange portions 22a and 23a but also the flange portions 22b and 23b can be restrained, the wear of the cradle roll can be dispersed and a life extension effect can be obtained.

  In the hot rolling line, using the winding device according to one embodiment of the present invention using the cradle roll shown in FIGS. 1 to 3, the plate thickness 2 is determined according to the winding procedure shown in FIGS. 4 to 7. A steel strip of 3 mm or less was wound up. A steel strip having a plate thickness of 2.3 mm or less, which has conventionally had a peripheral winding deviation of about 10%, was wound using the winding device according to the embodiment of the present invention described above.

  As a result, the thin steel plate with a thickness of less than 1.8mm might be folded at both ends due to the cradle roll jaws, but the peripheral winding deviation was almost eliminated at the thickness of 1.8 to 2.3mm. It was done. As a whole, the quality drop due to the circumferential winding deviation of about 5% has been improved to about 0.3%.

It is a top view of the cradle roll in one Embodiment of this invention. It is a bottom view of the cradle roll in one embodiment of the present invention. It is explanatory drawing of the collar part height of the cradle roll in one Embodiment of this invention. It is explanatory drawing of the winding procedure of the steel strip using one Embodiment of this invention. It is explanatory drawing of the winding procedure of the steel strip using one Embodiment of this invention. It is explanatory drawing of the winding procedure of the steel strip using one Embodiment of this invention. It is explanatory drawing of the winding procedure of the steel strip using one Embodiment of this invention. It is a top view of the cradle roll in other embodiments of the present invention. It is explanatory drawing of the winding apparatus of a steel strip. It is explanatory drawing of the winding shift | offset | difference of a coil outer peripheral part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel strip 1a The last end of a steel strip 2 Coil 5 Side guide 6 Pinch roll 10 Winding device 11 Mandrel 12 Guide apron 13 Presser roll 21 Coil car 22 Cradle roll 22a, 22b Hook 23 Cradle roll 23a, 23b Hook 24 Rack 25 rack 26 pinion 40 coil outer periphery winding deviation

Claims (3)

  In the winding device for a metal band, comprising a shaft that winds the metal band around the coil and a coil car that carries the wound coil on a pair of cradle rolls, each of the pair of cradle rolls is on one side A metal characterized in that a flange is provided at the end, and the flange is disposed so as to face each other with a coil interposed therebetween, and has a moving mechanism for moving each cradle roll in the axial direction. Belt take-up device.   In the winding device for a metal strip, comprising a shaft for winding the metal strip around the coil, and a coil car for carrying the wound coil on a pair of cradle rolls, the pair of cradle rolls are arranged on both sides. A winding device for a metal strip, characterized in that a flange is provided at the end and a moving mechanism for moving each cradle roll in the axial direction.   A metal band winding method using the metal band winding device according to claim 1 or 2, wherein the pair of cradle rolls are moved in the axial direction and the tail end portion of the metal band is moved at the flange portion. A method for winding a metal band, wherein the winding is performed while restraining both width ends.

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